RE: SONIC 500
freeair:
I have also an SONIC500 from Sportsman Aviation, (bought in QLD, Australia a couple of years ago)
And have not reinforced the wing, I just use 30 min epoxy to join the wing half’s. The engine I use is a
Webra 40 and have done a lot of races in the Swedish Q500 series and the wing works great as it is!
But I do add some strength the fuselage sides with some 10 mm balsa, to create wing saddles due poor
Quality to material in the sides.
PM